Boiler furnace



A ril 13 1926. 1,580,205

J. KEMNAL INVENTOR TORNEY April 13 192m 1,580,205

J. KEMNAL BOILER FURNACE Filed July 1924 2 Sheets-Sheet 2 76 if i a .I

I INVENTOR BY? M ATTORNEYS) Patented Apr. 13, 1926.

UNITED STATES PATENT OFFICE.

' JAMES KEMNAL, E Lennon,, neLAnn'AssIenoR To THE BABCOCK & WILCOX 001v:-

PANY, 0E BAYONNE, NEW JERSEY, A CORPORATION OF NEW JEBsEY.

I BOILER FU NACE.

Applicatiim filed July 26, 1924. Serial'No. 728,430.,

To all whom it may concern Be it known that I, JAMEs ject of the King of the United Kin of Great Britain and Ireland, and residing at London, England, have invented eertainnew and useful Improvements in Boiler Furna ces, of which the following is a specification.

My invention relates to furnaces'for steam generators and will be best understood from the following description taken with the annexed drawings in which Figure 1 is an elevational view partly in vertical sectionof an illustrative embodiment of my invention and Figure 2 is a section taken on the line 22 of Fig. 1.. p

In said drawing 10 denotes an arch formed of refractory masonry disposed betweena mechanical stoker 11 and roof .12 of a combustion chamber. It will be noted that the front end of arch 10 isspacedfrom the front wall 18 of the combustion chamber and, preferably, the rear end of arch 10 is also spaced from the rear'wall 1a of the furnace chamber 15. By such arrangement a portion of the 'ases evolved from the fuel on grate 11 will pass around the forward end of arch 10 through the space between the upper side of said arch and the roof 12 of the combustion chamber and into the fur nace chamber 15. 4 v I Due to the fact that arch 10 would thus be subjected to heat on both sides, it would ordinarily be liable to collapse. To obviate this difficulty I preferably interpose between arch 10 and roof 12 a plurality of openended, hollow, retort-like structures 16 in abutting relation, and themselves constituting the voussoirs of an arch, for which are provided abutments 17, 17. Advantageously, I line the ends of structures 16 with a layer of refractory bricks 17 Preferably, structures 16 are provided with keyways 18 for the reception of keys (not shown) in order to form a stronger arch.

Due to the highly heated arch 10 my irn- KEMNAL, a sub:

1. In a boiler ry, ample opportunity will. be given for the combustion of such gases. Otherwise, the gases evolved on this portion of the grate might not be given sufficient opportunity for mixing with the air and for combustion therewith, and, in addition, might interfere with the combustion of the gases evolved at the rear portion of the grate. On the other hand, the gases evolved at the rear end of the grate, due to the fact that their temperature is considerably higher, undergo comfrom the front wall of the combustion chamber and a plurality of structures having longitudinal passages in the space between said arch and the roof of said chamber protecting the upper side of the arch from the flames and affording a passage for the products of combustion therethrough to the furnace chamber.

2. In a boiler furnace, chamber, an arch disposed intermediate the furnace grate and the roof of said chamber and having the front and rear ends thereof spaced from the front wall of said chamber and the rear wall of the furnace chamber respectivelyvand :a' plurality of structures having longitudinal passages therethrough in the space between said arch and the'roof .of said chamberprotecting the upper side of the arch from the flames and affording a passage for the products of combustion therethrough to the furnace chamber.

3. In a boiler furnace, a combustion chamber, an arch'disposed intermediate the furnace grate and the roof of said chamber and having the front end thereof spaced from the frontwall of said chamber and a plurality of structures having longitudinal passages therethrough in the space between said arch and the roof of said chamber protecting the u per side of the arch from the flames and a ording a passage for the proda combustion Q a I 1,580,220

ucts o'l combustion therethrough to the furnace chamber and means for supporting said structures independently of said arch.

l. In a boiler furnace, a combustion chamber an arch disposed intermediate the furnace grate and the root of said chamber and having the front end thereof spaced from the front wall 01 said chamber and a plurality of structures having longitudinal passages therethrough in th space between said arch and the root of said chamber protecting the upper side of the arch from the flames and affording a passage for the prod nets of combustion thercthrough to the furnace chamber, said structures themselves forming the voussoirs of an arch and abutments for such arch.

5. In a boiler furnace, a combustion chamber, an arch disposed intermediate the furnac grate and the roo'l of said chamber and having the front end thereof spaced from the front Wall ofsaid chamber and a plurality of structures having longitudinal passages therethrough in the space between said arch and the roof of said chamber protecting the upper side of the arch from the flames and afiording a passage for the proclucts of combustion. therethrough to the furnace chamber, said structures being keyed together and themselves forming the voussoirs of an arch and abutments for such arch.

JAMES KEMNAL. 

